Xenobiologists grinding through the work

Author Notes:

* The female Hsufir has a penis-like sucker organ that enters the male and sucks a hemiovum out of his body. If she becomes pregnant, he breastfeeds her until the babies claw their way out through her belly flap. Then the parents jointly nurse their offspring.
The babies remain sexless until they kill and eat an adult of their species. They then assume the sex of that adult. Look, nobody said xenobiology was cozy or clean.